Convert network hints to Mojo

chromecast/browser/cast_content_browser_client.h

Index: chromecast/browser/cast_content_browser_client.h
diff --git a/chromecast/browser/cast_content_browser_client.h b/chromecast/browser/cast_content_browser_client.h
index 15d685100ffb86d3103a9cc7b72bbf830761074b..094bed5783c1463fc6fb67beb785e3c3d99a8ffd 100644
--- a/chromecast/browser/cast_content_browser_client.h
+++ b/chromecast/browser/cast_content_browser_client.h
@@ -28,6 +28,10 @@ namespace metrics {
 class MetricsService;
 }
 
+namespace network_hints {
+class NetworkHintsMessageFilter;
+}
+
 namespace chromecast {
 class CastService;
 
@@ -192,6 +196,8 @@ class CastContentBrowserClient : public content::ContentBrowserClient {
   CastBrowserMainParts* cast_browser_main_parts_;
   std::unique_ptr<URLRequestContextFactory> url_request_context_factory_;
 
+  std::unique_ptr<network_hints::NetworkHintsMessageFilter> network_hints_;
+
   DISALLOW_COPY_AND_ASSIGN(CastContentBrowserClient);
 };